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CVE-2026-111896— phpMyFAQ 4.2.0-alpha before 4.2.0-beta Stored XSS via SVG Upload Sanitizer Bypass

Quick assessment

Affected
thorsten phpMyFAQ
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

phpMyFAQ 从 4.2.0-alpha 版本到 4.2.0-beta 之前的版本中，其 SvgSanitizer 组件存在存储型跨站脚本（Stored XSS）漏洞。该漏洞允许 FAQ 编辑者上传可执行的 SVG 文件。攻击者可以将 标签拆分，并围绕被移除的标记（如处理指令）进行放置，从而利用单遍过滤机制的缺陷，使这些标签在过滤后重新组合。当受害者打开该文件时，恶意脚本将在应用程序的源上下文中执行。

CVSS 5.4 · Medium EPSS 0.17% · P6

Affected Version Matrix 2

VendorProduct Version RangeStatus
thorsten phpMyFAQ 4.2.0-alpha< 4.2.0-beta affected
4.2.0-beta unaffected
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I. Basic Information for CVE-2026-111896

Vulnerability Information
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Vulnerability Title
phpMyFAQ 4.2.0-alpha before 4.2.0-beta Stored XSS via SVG Upload Sanitizer Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
phpMyFAQ from 4.2.0-alpha before 4.2.0-beta contains a stored cross-site scripting vulnerability in SvgSanitizer that allows FAQ editors to store executable SVG files. Attackers can split script tags around removed tokens like processing instructions so single-pass removal reassembles them, executing script in the application origin when victims open the file.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
数据的崩溃导致不安全数值
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
thorsten phpMyFAQ 4.2.0-alpha ~ 4.2.0-beta -

II. Public POCs for CVE-2026-111896

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III. Intelligence Information for CVE-2026-111896

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Vendor Advisories for CVE-2026-111896 (2)

Same Patch Batch · thorsten · 2026-10-17 · 28 CVEs total

CVE-2026-111911 9.8 CRITICAL phpMyFAQ 4.0.0 before 4.1.9 Authentication Bypass via WebAuthn Credential Injection
CVE-2026-111908 8.3 HIGH phpMyFAQ 4.0.0 before 4.1.9 and 4.2.0-alpha before 4.2.0-beta BOLA in FAQ Update via REST
CVE-2026-111884 8.3 HIGH phpMyFAQ before 4.1.9 and 4.2.0-alpha before 4.2.0-beta Missing Current-Password Step-Up o
CVE-2026-111882 8.1 HIGH phpMyFAQ 3.2.0-alpha before 4.1.9 and 4.2.0-alpha before 4.2.0-beta TOTP 2FA Bypass via SS
CVE-2026-111909 8.1 HIGH phpMyFAQ before 4.1.9 Missing Authorization Allows Superadmin Deletion via deleteUser API
CVE-2026-111898 7.5 HIGH phpMyFAQ 4.2.0-alpha before 4.2.0-beta Account Takeover via Keycloak Implicit Account Link
CVE-2026-111901 7.5 HIGH phpMyFAQ 4.2.0-alpha before 4.2.0-beta Unauthenticated DoS via API Pagination
CVE-2026-111897 7.1 HIGH phpMyFAQ 4.2.0-alpha before 4.2.0-beta Authorization Bypass in Attachment Administration E
CVE-2026-111907 7.1 HIGH phpMyFAQ 4.0.0 before 4.1.9 CSRF via /admin/api/update-database
CVE-2026-111895 6.8 MEDIUM phpMyFAQ 3.2.0 before 4.0.0 and 4.0.2 before 4.2.0-beta Account Takeover via Entra ID pref
CVE-2026-111892 6.5 MEDIUM phpMyFAQ 4.2.0-alpha before 4.2.0-beta Missing Rate Limiting on Password-Reset Endpoints
CVE-2026-111910 6.5 MEDIUM phpMyFAQ before 4.1.9 and 4.2.0-alpha before 4.2.0-beta Authorization Bypass via attachmen
CVE-2026-111886 6.5 MEDIUM phpMyFAQ 4.2.0-alpha.2 before 4.2.0-beta 2FA Brute-Force via remove-twofactor Endpoint
CVE-2026-111893 6.5 MEDIUM phpMyFAQ 4.2.0-alpha before 4.2.0-beta Privilege Escalation via Group Category Restriction
CVE-2026-111906 6.5 MEDIUM phpMyFAQ before 4.1.9 and 4.2.0-alpha before 4.2.0-beta CSRF in Elasticsearch/OpenSearch A
CVE-2026-111905 6.0 MEDIUM phpMyFAQ 3.2.0 before 4.1.9 and 4.2.0-alpha before 4.2.0-beta IDOR Leaks TOTP Secret via /
CVE-2026-111891 5.5 MEDIUM phpMyFAQ from 4.2.0-alpha.2 before 4.2.0-beta Privilege Escalation via Group Permissions A
CVE-2026-111890 5.5 MEDIUM phpMyFAQ 4.2.0-alpha.2 before 4.2.0-beta Privilege Escalation via updateUserRights
CVE-2026-111885 5.5 MEDIUM phpMyFAQ 4.2.0-alpha before 4.2.0-beta Missing Authorization via deleteGroup API
CVE-2026-111894 5.4 MEDIUM phpMyFAQ 3.2.1 before 4.1.9 and 4.2.0-alpha before 4.2.0-beta Stored XSS via iframe data:

Showing top 20 of 28 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: phpMyFAQ
Same vendor: thorsten
Same weakness: CWE-182

V. Comments for CVE-2026-111896

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